SN74LVCH245ADWR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Level Shifter and Bus Transceiver
• Characteristics: Low-Voltage CMOS Octal Bus Transceiver with 3-State Outputs
• Package: SOIC (Small Outline Integrated Circuit) package
• Essence: This IC is designed to facilitate bidirectional level shifting between different voltage domains, making it suitable for interfacing between devices operating at different logic levels.
• Packaging/Quantity: The SN74LVCH245ADWR is available in a reel packaging with 2500 units per reel.

Specifications

• Supply Voltage Range: 1.65V to 5.5V
• Logic Voltage Levels: Compatible with both 3.3V and 5V systems
• Number of Channels: 8
• Output Drive Capability: ±24mA
• Input Capacitance: 4pF
• Propagation Delay: 2.7ns (max)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The SN74LVCH245ADWR has a total of 20 pins, which are assigned as follows:

1. OE (Output Enable) - Active LOW output enable input
2. A1 - Data input/output pin 1
3. B1 - Data input/output pin 2
4. A2 - Data input/output pin 3
5. B2 - Data input/output pin 4
6. A3 - Data input/output pin 5
7. B3 - Data input/output pin 6
8. A4 - Data input/output pin 7
9. B4 - Data input/output pin 8
10. GND - Ground
11. B5 - Data input/output pin 9
12. A5 - Data input/output pin 10
13. B6 - Data input/output pin 11
14. A6 - Data input/output pin 12
15. B7 - Data input/output pin 13
16. A7 - Data input/output pin 14
17. B8 - Data input/output pin 15
18. A8 - Data input/output pin 16
19. VCC - Power supply voltage
20. DIR (Direction Control) - Direction control input

Functional Features

• Bidirectional level shifting between different voltage domains
• 3-state outputs for bus-oriented applications
• Compatible with both 3.3V and 5V logic systems
• Low-voltage CMOS technology for reduced power consumption
• High output drive capability for driving capacitive loads

Advantages and Disadvantages

Advantages: - Enables interfacing between devices operating at different logic levels - Supports bidirectional data transfer - Low power consumption - High output drive capability

Disadvantages: - Limited to a maximum of 8 channels - Requires careful consideration of voltage compatibility between connected devices

Working Principles

The SN74LVCH245ADWR operates by receiving data from one voltage domain and translating it to the appropriate logic levels of another voltage domain. The direction of data flow is controlled by the DIR pin. When the DIR pin is set to a specific logic level, the IC either transmits data from the A-side to the B-side or vice versa. The OE pin is used to enable or disable the outputs.

Detailed Application Field Plans

The SN74LVCH245ADWR is commonly used in various applications, including:

1. Microcontroller interfacing with peripheral devices operating at different voltage levels.
2. Level shifting in communication interfaces such as UART, SPI, and I2C.
3. Bus transceiver for bidirectional data transfer between different voltage domains.
4. Logic level conversion in mixed-voltage systems.

Detailed and Complete Alternative Models

1. SN74LVC245A: Similar functionality with a wider supply voltage range (1.2V to 3.6V).
2. SN74LVCH244A: Octal buffer/line driver with similar characteristics but without bidirectional capability.
3. SN74LVC4245A: Octal dual-supply bus transceiver with voltage translation capability.

These alternative models provide similar functionalities with slight variations in specifications and features, allowing users to choose the most suitable option for their specific requirements.

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